I have a hard time believing that anyone who holds/controls large sums of bitcoin are going to keep it in places that can be identified as being owned by one person or entity (unless they are a public company or a government that has to make those kinds of disclosures).
If I were to hold any appreciable amount of Bitcoin (I do not, of course) I would set it up so that it was stored in a multisig cold storage setup (optionally with hardware wallets separately geo-located). But I would also backup the private keys for each address with <1BTC. No addresses would have more than, I dunno, 0.7BTC and all slightly different. But there would be a spreadsheet, created on an airgapped laptop, that was GPG encrypted that held those individual keys... You know... In case. I would have created detailed instructions on how to access all these Bitcoin (1. With hardware wallets, 2. With Seed Phrases and passwords 3. With individual private keys in the worst case scenario), and trained my wife, and eldest child on the procedure.
But I do not have that sort of Bitcoin stash, so I just hold what I have on Coinbase.
Plus if i DID have that sort of stash?? All those details up there? Different than what I (would) have really done.
Or not?
Nevermind...
Let's just say that I did not get reckt too badly in this latest leveraging liquidation of the past several weeks, and I was still able to hold onto my greater than 0.63BTC, then how much greater than 0.63BTC would I need to get before it triggered a "separation" threshold concern?
Within your guidelines, if I were to get up to 0.7 BTC, then that would cause me to end up with wallets around 0.35BTC each.. of course, not the same exact amounts in each wallet, necessarily..
I am pretty sure that if I play my cards right, I should be able to get over 0.7BTC.. but these are scary times.
By the way... fuck off in regards to your name-dropping "Coinbase".. not that you intended to do it
(so don't be taking my colorful language too personally like some peeps seem to do, not going to mention the name of bloody mary, because who wants bloody mary showing up merely because it was mentioned three times in a row while looking in a mirror with three screaming school girls).. I know Jbreher used to name drop Coinbase a lot, and probably just to get little digs in here and there.. not that jbreher is particularly mean.. but he was kind of against going along with certain things, including our use of Stamp as our thread price reference.
In recent times, I have been telling newbies to start out with
https://www.swanbitcoin.com/ and they allow you to buy through their cite and also to transfer your coins off of their cite, but they do not have any way to sell BTC through their cite, so a bit of a quandary in terms of one-stop shopping for beginners.